Mechanical Performance Analysis of Design Scheme for High-speed Train Obstacle Deflector with Built-in Aluminum Honeycomb Covered Energy Absorber
Journal Title: Urban Mass Transit - Year 2025, Vol 28, Issue 2
Abstract
［Objective］ The OD (obstacle deflector) serves as a primary passive safety device on high-speed trains, effectively clearing obstacles between the wheels and the tracks. However, conventional OD designs do not meet the energy absorption requirements under the newly-added intermediate position overloading conditions specified in the EN 15227:2020 standard. Therefore, it is necessary to optimize the energy absorption design of high-speed train OD. ［Method］ The existing OD design is optimized, and a new design incorporating a built-in aluminum honeycomb covered energy absorber is proposed. A 3D model of the high-speed train OD with the built-in energy absorber is created, and the LS-DYNA software is used for computational analysis of the OD compression process, obtaining a simulated buffer force-displacement curve of the pilot. A quasi-static compression test is conducted on the OD using a 500-ton press machine, and the experimental buffer force-displacement curve of the OD is obtained. The simulated and experimental curves are compared to verify the reliability of the simulation results. ［Result & Conclusion］ Both the simulation and experimental results meet the requirements of EN 15227:2020, and the simulated curve shows high consistency with the experimental curve, confirming the feasibility of applying the established 3D OD model and simulation calculations results for guiding design proposals. During both the simulated and experimental compression processes, the optimized OD demonstrates stable compression performance, with a stable and controllable buffer force-displacement curve.
Authors and Affiliations
Hongshuang LI, He LI, Peng XU, Haomiao ZHANG, Zhengcheng QIU
Keywords
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- EP ID EP759808
- DOI 10.16037/j.1007-869x.2025.02.011
- Views 37
- Downloads 0
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